That’s legit, though — sort of like pages that are marked “This page intentionally left blank.” Which of course is a paradox, since it’s no longer blank. ;-) Anyway, I’ve had a few times where the CC stream broke down in the middle due to poor cable reception, prior to the digital TV era*, so I could see where a totally deaf person might be concerned that the closed captions had failed, rather than being merely a moment of intentional silence. In modern times it’s probably less useful.

* Thanks to codecs, on digital TV “poor reception” means the entire channel just ceases to work — not a day goes by where I don’t curse the local network “upgrade”, since I’d rather have a bit of grainy interference rather than occasional three to ten second total interruptions in my broadcast. Holy regression, Batman.